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- 1. Multiple Choice
the force of friction acts in the direction__________ to the motion of the object
as same as
opposite
both
all of the above
- 2. Multiple Choice
without friction, an object in motion would never stop
true
false
- 3. Multiple Choice
material with _______________ surfaces have less friction
smooth
rough
both
- 4. Multiple Choice
you can walk because there is friction between your __________ and ______________
ground and air
feet and ground
feet and air
air and ground
- 5. Multiple Choice
friction helps you write on a paper or black board.
true
false
- 6. Multiple Choice
having streamlined vehicles can reduce friction
true
false
- 7. Multiple Choice
these are used to reduce unwanted heat in cars
powder
oil
coolants
- 8. Multiple Choice
these are examples of lubricants
oil,
grease
powder
all of the above
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